Research On The Feature Of YanChang Formation Reservoir In ZhenJing Region, Southern Part Of Ordos Basin

The sandstone reservoir of Yanchang formation in ZhenJing region, south of Ordos Basin, belongs in a low prosity and supper-low permeability reservoir. Recent exploration shows that most Yanchang formation reservoir have good hydrocarbon showings, but its testing oil production can't reach the anticipant result. Reaserch indicates that the external factors restrict getting favourable oil production in ZhenJing region, such as reservoir physical properties and oil content. So it is very necessary and important to study the reservoir characteristics and search the distribution of the advantaged reservoir in this region.According to the gathering plentiful relative datum, such as seismic, well logging, surveys, core ect which coming from the exploitation and exploration, the research starts with analise of slice data, core observation and core specimens, then combines with coordination analyse, concluding and the former research result to study the feature of Yanchang formation in this region. This article analyses the characrersitics an the pore texure of the reservoir, and then classifies and evaluates the reservoir rock in Yanchang formation. Based on the result of detailed core observation and fracture explanation in well logging, the article uses single well fracture indentifying and evaluation to calculate parameters of fracture. Finally,combining with the principal curvature for tectonics deformation, the article predicts the plane fracture of reservoir and weave the general evaluation map of crack fracture growth. Using well logging, the article identifies the oil section and interprates the physical property parameters of Yanchang reservoir, and then evaluates the distribution of reservoir. After discussing the relationship between the sandbody distribution and the formation of oil trap, the article found the distribution area of the advantaged reservoir. At last, the article discusses the main factors which control prodution capacity of single well in Shuguang oilfield, ZhenJing region, and evaluates production capacity in this area. Also the article analyses the performance feature of the reservoir. From the reaserch, we get new acquaitance about the characteristics and the distribution of Yanchang reservoir.